Gas burner



1,670,209 F. C. PARDON GAS BURNER Filed Nov. 8, 192

7 accompanying drawing,

Patented May 15, 1928.

GAS U NER.

7 Application filed November The object of thisinvention is to provide anattachment for gas burners by which, when the burner is vnot :to be used, the flame will be automatically reduced, and also'to provide means whereby it it be desired to maintain the flame for a protracted period the reduction of the prevented without requiring of the user of the device. The invention is designed more particularly for, use in dental I laboratories ed for use in .other fields. ment of the invention 'is illustrated and the invention resides in'cerjtain novel features which will be particularly pointedout in the ,claims tollowing a detailed description;

In the drawing: Figure '1 is aside elevation of a Bunsen burner having my invention applied theret0: v Fig. 2 is an elevation of-the device viewed at a rightangle to Fig. 1, and i Fig. 3 is a'detail seetion on the line .373 of Fig.1. y

-The burner shown at 1 is an ordinary Bunsen burner fed by a pipe 2 leading from any convenientsource of supply. The burner is mounted upon a base 3 of suflicient area to support the burner in a stable manner so thatthe liability of the device to tip over will be avoided. Where circumstances permit, the burner may be mounted upon a fixed support so that all possibility of accident will be eliminated.

In carrying out the present invention, there is secured about the burner, adjacent theupper end thereof, a bracket 4: having an arm 5 projecting laterally from the burner and formed with an eye or opening whereby it may guide a standard or rod 6 which is disposed at the side of the burner and has its upper end formed into or equipped with. a laterally disposed rest 7, as shown. The lower end of the rod 6 is pivotally attached to one end of a lever or rocking arm 8 which is secured to the end of the valve stem 9 which controls the flow of gas through the burner. This arm or lever in the present instance is shown as inserted diametrically through the end of the valve stem but it may be secured thereto in any other manner which will have the required permanence. A. contractile spring 10 is engaged with the end of the lever 8 more One embodiremote from the rod 6; and this spring is same may be the attention but it is of course, adapt in the s, 1926f Serial -No. 147,118.

attached tothe base 3, as shown in 1 and 2; so that it 'tendsconstantlyto-pull down uponfithe 'lever and maintain the-same in the 'position'v shown in full lines in Fig, 1' wlth the sta-ndard or rod 6 elevated. Fitted about the body of the burner, below the I cut-oilvalve'therein so as to 'be held frictionally in a set position, '=is a split collar 11' by which iscarried-an outwardly and up wardly extending; stop arm 12 which projects below the of n'iov'ement of the fsan'ie'so that it Will b'B engaged by said lever when the same is actuated by the spring 10. It the collar- 11 be shifted about the body of the burner 1 lever 8 and {across the path so that the stop '12 is disposed adjacent the, "valve stem or center of movement oii the I leverythe lever may swing to the liinito f its movement, as shownin Fig. 1. If, however, 7 the .collar '11 be shitte'dabout the burner so as to swing the stop 12 to a point more re mote jfroni the valve stem or the center of movement of the lever, the oscillation of the "lever will be more restricted inasmuch as the end of the-*lever will impinge against the stop as thelever swings downwardly Ail) and, consequently, it will be prevented from swinging through an arc of the extent indicated by the full and dotted lines in Fig. 3.

Normally, the rod 6 and the rest 7 are held in their elevated, positions and there is a very low flame maintained in the burner. If an operator desires to heat a. tool or to warm wax or do anyother act which in laboratory practice requires the application of heat, he merely presses downwardly upon the rest 7 so 6 will be depressed and the lever 8 rocked to the position indicated by dotted lines in that the rest and the'rod I I Fig. 1, thereby turning the cut-off valve so as to permit an increased flow of fuel through the menting the flame. In common practice, the use of the burner is required for only a few seconds at any one timebut the periods of use are very frequent. It the flame be permitted to play at its extreme height at all times, there will'be an uneconomical use of the gas as well as an undesirable heating burner and consequently, augof the air surrounding the burneiu and if the flame be entirelyextingiushed' after each period of use and the burner re-lighted every time its use is desired, there is obviously a great loss of time. the present device, the flame is automatically increased when the operator presses upon By the use of the rest'l", and frequently the tool may be merely placed upon the rest so that its Weight will Overcome the force of the spring,

10 and hold the Work in the proper relation to the flame Which will be increased by the .turning of the cut-off valve in an "obvious manner. WVhen the tool is removed; the

spring 10 will automatically restore the parts to the normalposition and reduce the flow of fuel. If; for any reason, it be desired to maintain the full flow of the gas or a lesser Working. floWffor, any considerable, period, the stop 12;.is shifted as above, described so that it Will prevent the movement of the lever 8 and the valve tothe cut-off position. thereby maintaining the flame at i the desired intensity While the operator may vthe \vork attend to some other duties.

The device is exceedingly simple, and may be easily applied to any burner Without interfering With the ordinary use thereof and Without entailing a I burdensome. expense toward cut-ofi' position. I

lever-whereby to maintain said end of the, lever normally 111 a lowered position, a rest carried by the opposite end of the lever and rising therefrom alongside the burner,

and a bracket secured upon the upper poi tion of the burner and having a laterally projecting guide arinengaging aroundthe rest. I a

The con'ibination'with .a gas-burner, and

its'cut-ofi' Valve, of a lever secured. tothe stem of the valve, a rest CllllGd by one end of the lever, yieldable means acting upon the other end of the lever to move thevalve toward cut-off position, anda stopnioanted; f

upon the burner shiftableabout the same adjacent the (It ll/ 01T valve .a-ni'lflextendingf across the path of movement of the levee to limit the anovement of the lever toward cut-off position. e

'3. The combination with a gaspburncr, jand lts eut-ofi'valve, of ai lever secured to the stem of the, valve, yieldable means acting on the lever to move the same toward' cut-off positlon, a rest carried by the lever,

a collar frictionally held upon the burner below the cut-off valve thereof and shiftable about the burner, and a stop "arm projectlng laterally from said collar aeross'the i path of movement of the levenwhereby to variably limitthe movement of the lever In testimony whereof I affix mysignaturi-a;

l iANCIS CECIL PARDON. 1,. t5 N 

